Andover Fabrics has some fantastic fabrics by Renee Nanneman called Itsy Bits. There are six separate collections of them and they would be perfect for tiny quilts. One collection is just checks, one just stripes, one just dots and three are general prints. On the two prints that I have, the pattern repeat is ¼".
For the checks collection, search for Itsy Bits Checklets by Andover Fabrics. Here's the Andover website pics of that group.
http://www.andoverfabrics.com/Grid.p...Bits Checklets
Be sure to check out the other five collections, too. They have some really great fabrics for small things like your quilts. I use them for greeting cards and love them.